Metal-spinning machine



Mar. 13, 1923. 1,448,577

J. S. STULL METAL SPINNING MACHINE Filed Mar. 19, 1920 3 sheets-sheet 1Mar. 13, 1923.

J. S. STULL METAL SPINNING MACHINE Mar.13,1923. 1,448,577

J. S. STULL.

METAL SPINNING MACHINE FiledV Mar. 19, 1920 5 sheets-sheet 3 f/,m v

/n Ven/Oft John 5km/ey w/ by Affy Patented Maru 13, 1923.

UNITED STATES PATENT OFFICE.

JOHN STANLEY STULL, 0F CHICAGO, ILLINOIS. ASSIGNOR TO WEST'EBNv ELECTRICCOMPANY, INCORPORATED, 0F NEW YORK, N. Y., A CORPORATION 0F YORK.

METAL-SPINNING MACHINE.

Application filed March 19, 1920. Serial No. 367,203.

Tooll `'who-m 'it may Conce rn Be it known that l, .loHN ri'riNLnr'r'nLL. a citizen olE the United itatee. residir.;` in Chicago, in thecounty ot Cook. State oi lllinois, have invented certain new and use iulimprovements in hletal-t-lpinniug Machines. ot' which the followinga isa toll.. clear, concise, and exact deserilition This invention relatesto special tools and machinery and more particularly to devices torspinning metal tubes and the like and it has tor its object to provide asimple` et'- icient and conveniently operable machine for spinning theshells or sleeves ol' the bases ot electrical vacuum bulbs ot' any kindinto the cap piel-es, though the invention is adapted t'or wide use inthis general eapacity or other similar work.

This invention. in `general. eoiuprises the provision of a pluralityY oftools which are carried on a rotary head and are adapted to revolveabout the axis thereot'. Resilient means are provided which tend to drawthe toolsY toward their common axis upon being released so as to impressthe work. naanually operable cam mechanism provided and adapted normallyto hold the tools in a retracted position. This mechanism is adapted tobe operated without stoppingr the rotary head. A yielding pad ispositioned approximately eoiurident with the axis ol the tools and'functions to hold the parts of the tube base in proper position whilethe spinningr operation is being per- Vformed. A supportV is providedjfor the parts of the tube, which is so constructed as to permit theparts to be readily presented to the spinning deviee and easily removedtrom the support after the spinning1V operas tion.

The invention further resides in certain other improvements andcombinations ot parts as Will be hereinafter more fully de scribed inthe specification and claims.

In the drawings: llwure l is a vertical, central` loi'ln'itndinalsection ot' a spinning machine constructed in accordance with andillustrating one embodiment ot my invention. with portions broken awayand other portions partly in side elevation; Figure is an elevation ofthe movable support for the parts ot' the tube during the spinningoperation; Figure 3 is a fragmentary detail'seetion in the same plane asliligure l but showing certain o i' the parts in different positions;Figure 4 is a transverse section on the line 2)#-2 ot Figure l .j Figureis a perspective View of the tool hesnhpartly broken away; Figure G is aperspeetive view ofY one ot the cams associated with the tool carriages:Figure T is a perspective vien' ot one of theV tool carriages; Fig-ure 8is au enlarged detail section through one ot' the tools; Figure 9 is aperspective view olf the finished workpiece; and Figure 1l) is auelevation of the tube support as viewed from the left in Figure Q.Similar reference numerals throughout the several views indicate thesame parts.

To tiret explain the nature of the work aeeoinplislnvl in the presentembodiment of the invention. ret'erenre is made to Figure 9 and to thefragment ol' the work-piece shown at the right ot' Figure l, wherein Arepresents a metal sleeve or shell on the hase ot' a vaeuum tube or bulbB. ln the end ot the shell is a cap Il of mirarta which carries theprojecting terminal plugs D and a cap oiI balelite or similar insulatingnuiterial. rthis rap has a peripheral V-shapeol groove Pl. and thefunction ot' the present machine is to spin a rib l on the inside of theshell to lori; in the `groove E and hold the cap in plaee. The rap Brests against the shoulder ot the shell and the cap C rests against therap Pi during spinning and is held there by means of the pad Vl5 bearingagainst it.

Referringuoiv to the other figures. l indicates a standard on the maintraine of the machine. which standard rarries the main bearing 2. and inthis bearing* turns the tnbula'r hul 3 of a. driving pulley 4 carryinglra belt 5. (,lhreaded at on the forward end of the hub 25 to turntherewith, is the hub T ot an annular tool head Fl. A rod 9 extendsaxially through the head H. The tortvard portion ot rod has a bearing at.t0 in the hub 7 and its rear end slides in a bearing 1l in al bracketarm 12 .secured to the standard t. A stop pin 13 threaded into thehearingr and cooperatingv 'with a `short groove .4 in the rod 9 preventsits rotation during its longitudinal movement. t its forward end. therod 9 carries a head in the torni ot a pad '15 with a surroundingr Hanne16. The rod 9 and pad l5 are normally held in a projected position.beyond the head 8 and the tools carried thereby, by a spring 1T coiledabout the rear end o't rod 9 betitveen a stop collar itl thereon and thebracket l2.

lire tool head (Figure is provided with alined radial guides if) inwhich a lpair ol' tool earriages :ZU is adapted radialliv io slide. (lneot the carriages is shown in etai'i in Figure i'. The inner end ol' eachcarria'r is hoi-ed at .i to rre-'fire a hollow stud :3i (Vigni-e n) onwiieh turns a dise tool Eil. 'the tool Lj is held in plaise by athreaded rap :il haring a eentrai nii opening :f elosed by a ball valve:iti that is held in piace h5 a spring 2T. The oil is eonnnun'r rated tothe hearing' ot' the tool l' on the stud 1&1.' through an opening in' inthe latter. Vihe rari'iages 2l) and the tools ti'iereon tend normali)Yto more inwardly toward the axis of the head under the influence ol'springs :22) ronnerting the rarriages togetheny the ends, ot eaeh springneing engaged orer pins Ilo projeeting lateralljfv lroiu the carriagesthrough slots 31 in. the guides l?. The

springs 2H lie in recesses H2 in the head parallelingr the guides 19.

1For the purpose ot permitting the tools and their rarriages to moreinwardly, the oxuer ends ot' the latter are hifureatetl t0 providerelies 152;", and extending between the nner ends of the arias ot these)pokes are rollers 334. (Tenis 35 engage beneath the rollers and extendthrough the Volies as .shown in Figures i and el. These. earns are ot'the Vtorni shown in detail in Figure 5 and are rigidly serured hysiren-s 36 to the `llaniie :51' oi' a sleeve fifi slidablelongitudinall)f on the hull i ol' the tool head H and rotating with it.The sleeve 38 is shit'tetl lian-li' and forth het irren the head and apair oi' threaded stop eollars Si! on the end ol` die huh i' hy ashitting derive carried by a standard 40 rising' at one sidi. of thestandard i and lorwardl)` ot it A lever il havinel a hearing on theupper end ot the standard l0. Whirl] extends through the hul if ot' thelever. is provided at one end with an @printing handle l and at theother with a yoke 4l (Figure il einliracing the sleere 25S and havin;vradial pins Al5 occupying hearings 4G in a ring' gli that is notrotatable hut occupies an annular groove 4S in the sleeve 25S. Byreciprocating the lever l. the sleeve CN carrying; the rains may beshifted hai-k and forth without stopping the head S.

The rains i5 normally oeeupv the forward position shown in Figure l inWhieh the earriage rollers occupy depressions 49 l'ornied al ilu highend o l' the mini surface. rlliis holds the carriages in their outerpositions and the tools 25% retracted.

ln Figures 2 and v10 is shown device for supporting' the work pirf'e ina position een trai with resnert to the axis of the spinning' dern-e andfor noovingir the work piere Jtor- \\ard into a position in whieh it isadapted to he operated upon h v the spinning head. This deviee comprisesa fixture which is srenred to a sliding tail stoel; 56 of the nun-,linieThe tail steek 5G has the usual orari-lied portion Si whirh is advancedor `elrarted or the rotation ot" a hand Wheel 5S an interior threadedbore 59. The ai portion if( has a stop 60 fixed to its tornartimovement. .Lili comprises a rectangular he open mid-portion oi nhieh hasa pla tor supporting the hallo B a' in rlln front portion ot' the loniprises a split rin@ olb an inner diameter rorresponding to the outerdianeler it the, nhe shell The shell A of the tulie rests on the lowerhalt G52 of the split ring'Y he upper hall' (Sil ot' the split ringpirotrat (SiV and is moved in place tr enilirase ilse sla-ll .i eurvedlever 65 piroted at HG is inoved into position so that a lat-hing notchUT thereon presses against the upper surface ol' the part Elli to holdit in ion embracinga the shell A. To engage swinnine headl the lixtureis moved torirard until the work piece presses against lhly pad lf nntiiit is in the plane ot the tools fit this instant the stop (it)prerentsl'nrtller forward maniement ot the fixture. The lerrr ll isilien operated to sleiit the sleeie im rt-aiwrzirdf` :ind allow thtIrollers i4 to ride down the surares oiI the rains 35. This rarries theim il inwardl \Y or toward .arh other and into engagement with theWorkpieee as shown in Vigni-e H with the requisite pressure to torn: theril; i". `dlhen so med= the hand lerer ell is moved in the oppositedirertinn advaiv-inir the rams through the rolies Tiri :ind cansino' therollers fiel to ride thereon so that the tools 23 are retrarrd and theirorlvpiet'e il. is tree to he Witlnlrawn.

The workingr parts :ire pret'eralil;Y enclosed within a snitalilehousing 50 provided with oiline apertures 5l and and with an axialopening 5? i'or he insertion of the workpieee.

'What is elairnml is:

1. ln :i maehine for spinning tubular metal nieniliers into supportingcaps. a Totary head. a spinning tool carried thereon, said tool beingadapted to he adjusted Without stopping said head. a holding;` mechanismtor advancing a tubular member and can into operative position to saidspinning' tool. and yielding? means eoin'ierating with said holdingmeans for maintaining the. eap in the desired position during;spinning'.

Q. ln a nnn-hine tor spinning tubular inetal lnenihers into snpportinf,rCaps, a rotary head. a radialliv adjustable spinnine'tool rarriedtherrw'm. yieidingj in lans `l'or inovingq .said tool into rcorlYengaging position during4 the rotation ot said head. ,means forretractine' said tool against the :ii-tion ol said yielding` means andduringr the rotation ot said h nl` a holdingi meehanism for advancing a`i lniri g' tubular member and cap into operative position to saidspinning tool, and means co operating With said holding means formaintaining the cap in the desired position during spinning.

3. In a machine for spinning tubular metal members into supporting caps,a radially adjustable spinning tool, a longitudinally movable holdingand centering device for a tubular member and cap and 'for advancing thesame into operative position to said spinning tool, and a springoperated pad movable relative to said head and passing therethrough tobe engaged by the cap as it and tubular member are advanced intooperative position to said spinning tool whereby energy is stored insaid spring operated pad to maintain the cap and tubular member inoperative relation during the spinning.

4. ln a machine of the character described.` the combination with arotary head and a pad arranged axially thereof and embodying a spindlereciprocally mounted in said head and a spring causing it to normallyprotrude yieldingly beyond the head, of a radially movable spinning toolon the latter adapted to cooperate with a work-piece held against thepad.

ln a machine of the character described, the combination with a rotaryhead having a hub and provided with a radial guide, and a pad arrangedaxially thereof, of a carriage slidably mounted in the guide` a spinningtool on the carriage, a spring tending to move the carriage inwardly tobring the tool into cooperation with a Worl -piece in pad device and asleeve slidable axially on the hub of the head and having a camcooperating with the carriage to retract the tool.

G. In a machine of the character described. a rotary head having a huband provided with a radial guide, a carriage movable in the guide, aspinning tool on said carriage, a spring tending to move said carriageinwardly of the head, arms projecting from the outer end of thecarriage, a roller extending between and carried by said arms and asleeve slidably axial on said hub, said sleeve having a cam cooperatingwith said roller to retract said tool.

T. In a machine of the character described, a rotary head having aradially arranged groove in the face thereof, a carriage reciprocallymounted in said groove, a spinning tool on said carriage, a Springtending to move said carriage inwardly, arms extending from the outerend of said carriage, a roller interposed between and carried by saidarms, and a reciprocating cam member projecting between said arms, saidcam member being adapted to retract the carriage against the action ofthe spring.

8. ln a machine of the character described, a rotary head having adiametrically arranged groove in the face thereof, carriagesreciprocally mounted in said groove, a spinning tool mounted on eachcarriage, a yoke at the outer end of each carriage, a roller carried byeach yoke. a cam member projecting through each yoke and contacting withsaid roller, said cam member being adapted to more said carriageoutwardly, and springs connecting .said carriages to normally draw themtoward each other.

ln Witness whereof, I hereunto subscribe my name this lz'ith day ofMarch, A. D., 1920.

JOHN STANLEY STULL.

